Date: Fri, 30 Jul 2004 23:09:07 -0400 From: Josh Elsasser <jre@vineyard.net> To: Maxim Sobolev <sobomax@portaone.com> Cc: sos@freebsd.org Subject: Re: Is there still sufficient reason for hw.ata.atapi_dma being 0 by default? Message-ID: <20040731030907.GA77313@jade.elsasser.org> In-Reply-To: <410A3833.7030502@portaone.com> References: <410A3833.7030502@portaone.com>
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On Fri, Jul 30, 2004 at 02:59:47PM +0300, Maxim Sobolev wrote: > Since high-speed CD-RW/DVD-RW recorders (32x - 52x) are commodity now > IMO it makes sense to review hw.ata.atapi_dma default of 0, since > apparently PIO mode can't support necessary sustained data transfer > rates anymore. For example I had had problems burning RWs on 16-24x with > several drives in PIO mode, which gone when I've switched to DMA. Funny, I have a cheap drive that I had problems with when using DMA, which (mostly) went away when I switched to PIO. Perhaps the burncd manpage should mention that you might have to fiddle with hw.ata.atapi_dma to burn successfully. -jre
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